away. >> david muir, thanks very much. >>> diane sawyer and i will have live coverage of the next big debate. the v.p. candidates go at it at 9:00 p.m. eastern, 6:00 p.m. pacific tomorrow. we're proud that the moderator will be our friend and abc correspondent martha raddatz. >>> turning to the brand-new details in the hunt for the missing colorado girl who vanished on her way to school last week. police are doing another search of her mother's home. and this morning, her parents are speaking out for the first time. clayton sandell is in denver with the very latest. clayton? >> reporter: good morning, amy. right now, police are chasing down 650 tips about jessica ridgeway, now missing for six days. we're also now hearing from her parents, who, for the first time, are making an urgent plea for their daughter's safe return. fbi agents descended on jessica ridgeway's home on tuesday, with her family's permission. bringing in search dogs and scouring the backyard, as her emotional parents spoke out for the first time. >> you get the pit in your stomach that you don't want any parent, any parent